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(No Model.) 3 Sheets-Sheet 1.

L. PREVOST.

GRAIN CLEANER.

Patented M31229, 1887.

\ WITNESSES Attorney N. PEIERS. PhollrLilhogrnphur. wuh'm mn. 0.0.

(No Model.) 3. Sheets--Sheet 2. L. PREVOST.

GRAIN CLEANER.

N0. 360,361. Patented Mar. 29, 1887.

- v v w A\\\\\\\\\\\\\\\\ WITNESSES N= PEYKRS. Pholo-ukhognphar. Wad'aingknn. D. C.

i (No Model.) s Sheets-Sheet a.

L. PREVOST.

GRAIN CLEANER;

No. 360,361. Patented Mar. 29, 1887.

Attorney Arnrwr Fries.

LOUIS PREVOST, OF Gl-IAMPOIIGG, OREGON.

GRAIN-CLEAN ER.

SPECIFICATION forming part of Letters Patent No. 360,361, dated March 29, 1887.

Application filed August 27, 1885. Serial No. 175,484.

(No model.)

To all whom it may concern.-

Be it known that 1, Lotus Penvos'r, a citizen of the United States of America, residing at Ohampoeg, in the county of Marion and State of Oregon, have invented certain new and useful Improvements in Grain-Cleaners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of refcn encc marked thereon, which form a part of this specification.

My invention relates to certain new and use ful improvements in mechanism for cleaning grain, which is to be used either independent of or in connection with a thrashingqnaehine.

The object of my invention is to provide an effective means for separating the chaff from the grain; and my invention consists in the construction and combination of the parts hereinafter fully set forth, and specifically pointed out in the claims.

In the accompanying drawings, which illustrate my invention, Figure 1 is a sectional view of a machine containing my improve ments. Fig. 2 is a bottom view of my improved grain-cleancr. Fig. 3 is a longitudinal and transverse section of the wipcr-frame. Fig. 4 is a detail perspective view of the screen-frame, wipers, and a portion of the screen. Fig. 5 is a transverse section of Fig. 4. Fig. 6 is a side View of the cleaner, some of its interior parts being shown in dotted lines. Fig. 7 is a detail perspective View of the wind-board, showing its relative position to the shoe, which is shown in dotted lines; and Fig. 8 is a detail perspective view of the ends of the wind-board, showing the means for attaching them to the supporting-bar.

A represents the side pieces of a suitable frame, which support-s a chute, B, for the grain. Said chute B has a solid inclined bottom, I), and an upwardly-inclined end, I), and is at tached to the side pieces, A, of the frame by means of suitable straps, a a, which are secured to the side pieces thereof and to the inner sides of the side pieces, A, by pins or bolts. The straps a are provided with aseries of perforations and pins, so as to provide a means of adjustment whereby the inclination of the bottom of the chute can be changed. The chute B is also provided with a cross piece, a, the end of which abuts against the fan-casing, as shown in Fig. 1, and said crosspiece will prevent the grain from being blown out of the chute by deflecting the blast from the fan in a horizontal direction against the passing grain.

The fan-casing O extends from the edge of the board a, is bent into circular form, and suitably attached to the crossbar G, which extends from the side pieces, A A, under the fan-casing, and the lower end of the aforesaid fan-casing terminates above the bottom of the shoe D.

The shoe D extends inwardly toward the fan, so that its rigid crosspiece (Z at its upper end will be nearer the fan than to the bottom I) of the chute B, so that the grain which is fed into the chute 'B will fall upon the board (1. The shoe 1) is provided with screens or perforated plates 0 c, the upper one of said screens extending from the outer edge of the crosspicee d to the end of the shoe, while the under screen, 0, extends from a point midway between the upper screen, 0, and the bottom board, its outer end terminating near the outer or lower end of the shoe.

The shoe D is attached to the side pieces, A, of the frame by means of straps f f, the lower ends of said straps being pivotally at tached to the side pieces of the shoe. Each,

rear strap, f, is slotted at its upper end, and is attached to the side pieces, A, by means of a bolt, in, and nut, so that said shoe can be raised and lowered so as to change the inclination of the screens and the bottom board.

A wind-board, G, is attached within the fan-casing, slightly above the lower portion of the same, and is provided with wings g g, which have loops 1) 12, attached near the ends of the same, so as to embrace the rod P, which projects through slots P in the side pieces,A, of the frame, the ends of said rod 1 being screw-threaded for the reception of thumb nuts for clamping said rod to the casing after it has been adjusted, thereby providing a means for adjusting the wings so as to increase or diminish the air-passage from the fan to the chute B and shoe D. The upper wing, g, is provided on either one or both ends with short screw-threaded rods q, which project through slots q in the side pieces, A, so that the angle of the wing 9 may be adjusted so as to vary the space between the under side of the wing and the bottom bbf the shoe B. The wing g of the wind-board G has a projecting portion, 9", which may be formed integral with the wing g, or attached thereto.

Under the shoe D is located a reciprocating screen-frame,H. This screen-frame is mounted on rollers H, and is reciprocated by means of a crank-shaft, I, which is provided with metallic connecting-straps P, which are attached to the under side of said frame H and to the crankshaft. The crank-shaft I is provided with a suitable drive-pulley, which may be connected with a pulley on the fan-shaft by means of a belt, the shaft of said fan being preferably driven by a belt from the thrashing-machine.

A frame, J, is attached to the sides A of the frame by means of rods J, which project through or into perforations in the side pieces, A, soas to hold said frame J stationary with respect to the side pieces, and said rods J project through horizontal slots J in the side pieces of the screen-frame H, so that said screen-frame can be reciprocated by means of the straps i and crank-shaft I, while frame J remains stationary. The cross or transverse bars of the frame J are provided with strips, 1, of flexible material, as leather, which are attached to the same, so as to come in contact with the lower surface of the screen and act as wipers to remove the dust from said screen. The leather strips 2' of said wipers are clamped between the bars K and K as shown in Figs. 3, 4, and 5, and may be removed when worn.

In Figs. 3, 4, and 5 the bars of the frame J are represented as each consisting of two sections, K and K", each being cut awayor recessed on its upper inner edge, so that they will jointly form a recess, in which the leather strips t are held; and the bars K K are clamped to each other by means of bolts K which extend through perforations K in said bars, and are provided with nuts K*, by means of which the wipers i can be adjusted when worn.

The screen in frame H is inclined, as shown, and is of sufiicient length to extend to a trough, K", which is provided with a suitable conveyer, while the bottom board of the frame which carries the screen does not project quite so far, but terminates over a similarly constructed trough, K, which receives the chaff and waste material, which may be removed therefrom by any suitably-constructed conveyer.

The wind-board G consists of three sections,

g g g, the section 9 being independently attached by means of loops p to the transverse shaft P, and is provided with a short bolt, q,

for adjusting the same so as to increase or diminish the size of the opening'between the under side of this section and the top of the bottom board of the shoe B,and the sections g 9 which are integrator rigidly secured to each other, can be raised or lowered by moving the shaft 1? in the slots 1? so as to increase or diminish the size of the opening or throat G.

If desirable, the shoe D may be reciprocated by means of a suitable crank-shaft and connections, and when so reciprocated the same will swing upon the strapsff.

The frame which carries the screen is provided with a hinged door, h, so that access can be had to the same in order to ascertain when the frame is properly adjusted.

It will be noted that the screens e 6 converge toward each other, so that before the grain reaches the lower end of the shoe the large particles of the chafi will be removed therefrom, and the windboard can be adjusted. so as, to regulate the. draft so that a greater or smaller amount of air will pass through the throat G to the screen e 6', according to the condition of the grain.

The grain to be cleaned may be fed directly from the spout of the thrashing-machine into the chute B, and is subjected to a blast of air, which passes over the section 9 of the windboard, which blast will remove the lighter port-ionsof the chaff from the grain. The partially-cleansed grain then falls from the inclined bottom board, 71, of the chute B upon the screens of the shoe D, and as it passes down the screens in said shoe another blast of air contacts therewith, which air passes through the throat G, under and through the screens, and blows from the grain the chaff. The grain then falls from the shoeD upon the reciprocating screen, which is carried by the frame H, the good grain being carried upon and for the purpose set forth.

ICO'

2. The combination, with agra1n-cleaner,of

a reciprocating frame, H, provided with a screen, and a stationary frame, J, located in the main frame, and having a series of bars, each comprising two sections, between which are clamped flexible wipers, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

LOUIS PREVOST.

Witnesses:

JOHN F. THEO. B BRENTANO, 'REGNIER BRENTANO. 

